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Gil-Munoz R.,Instituto Murciano Of Investigacion Y Desarrollo Agroalimentario | Fernandez-Fernandez J.I.,Instituto Murciano Of Investigacion Y Desarrollo Agroalimentario | Crespo-Villegas O.,Instituto Murciano Of Investigacion Y Desarrollo Agroalimentario | Garde-Cerdan T.,Institute Ciencias Of La Vid Y Del Vino Csic Car Ur
Food Research International | Year: 2016

Two preharvest treatments (methyl jasmonate or cell wall yeast) of grapevines (Monastrell and Tempranillo) were applied during two vintages (2014 and 2015) to check whether these elicitors enhanced stilbene accumulation in berries at the moment of harvest and in the corresponding wines elaborated with them. The main objective was checking the effect of treatment, variety and year on stilbene composition due to the interesting health-related properties of these compounds in both grapes and wines. The results pointed to inter-varietal and inter-annual differences, and that the treatments generally enhanced the stilbene composition of grapes and, particularly, of wines. The increase was more evident in Monastrell variety than in Tempranillo variety and in their wines more than their grapes during 2014 vintage but not during 2015 vintage. © 2016 Elsevier Ltd.


Bouzas-Cid Y.,Viticulture and Enology Research Station of Galicia EVEGA INGACAL | Portu J.,Institute Ciencias Of La Vid Y Del Vino Csic Car Ur | Perez-Alvarez E.P.,Institute Ciencias Of La Vid Y Del Vino Csic Car Ur | Gonzalo-Diago A.,Institute Ciencias Of La Vid Y Del Vino Csic Car Ur | Garde-Cerdan T.,Institute Ciencias Of La Vid Y Del Vino Csic Car Ur
Scientia Horticulturae | Year: 2016

Wine colour is a quality index that can provide information about conservation state, age or the presence of defects. Anthocyanin compounds are colour-related molecules and their concentration is affected by several factors such as grape variety, berry maturity degree or cultural practices. The aim of this work was to determine the anthocyanin composition of Mencía wines and how this is affected by the establishment of different cover crops (native vegetation, ryegrass and subterranean clover) respect to soil tillage treatment. This study was carried out during two consecutive seasons in the same vineyard. The use of cover crops significantly affected wine anthocyanin content; even though, their basic attributes were not altered by the treatments. In 2013, the wines from the ryegrass treatment had a significantly greater total anthocyanins concentration and, in 2014, the wines under the native cover had the highest concentration of these compounds. In both years, wines coming from the treatment under subterranean clover had a lower concentration of total anthocyanins when compared with those from the rest of the treatments. Cover crops increased wine anthocyanin concentrations when compared to the tilled treatment. However, the type of cover crop causing the highest increases differed from year to year. © 2016 Elsevier B.V.

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